<!DOCTYPE HTML>
<html>
<head>
    <title>Test My WebSocket</title>
</head>


<body>
TestWebSocket
<!--<input  id="text" type="text" />-->
<!--<button onclick="send()">SEND MESSAGE</button>-->
<!--<button onclick="closeWebSocket()">CLOSE</button>-->
<div id="message"></div>
<div>
    <label id="seq"></label>
</div>
<div>
    <label>scene image:</label> <br/>
    <img height="500" id="picture" src="" width="700">
</div>
<div>
    <label>lidar image:</label> <br/>
    <img height="500" id="lidarPicture" src="" width="700">
</div>
</body>

<script type="text/javascript">
    var websocket = null;
 
 
    //判断当前浏览器是否支持WebSocket
    if('WebSocket' in window){
        //连接WebSocket节点
        websocket = new WebSocket("ws://localhost:9099/ws/replay/YTKJ20210073/1234");
    }
    else{
        alert('Not support websocket')
    }
 
 
    //连接发生错误的回调方法
    websocket.onerror = function(){
        setMessageInnerHTML("error");
    };
 
 
    //连接成功建立的回调方法
    websocket.onopen = function(event){
        setMessageInnerHTML("open");
    }
 
 
    //接收到消息的回调方法
    websocket.onmessage = function(event){
    var jsonObj=JSON.parse(event.data);
    console.log(jsonObj.picture)
    document.getElementById("seq").innerHTML = jsonObj.sequenceId;
    document.getElementById('picture').src="data:image/png;base64," + jsonObj.picture
    if(jsonObj.lidarPicture != ""){
    document.getElementById('lidarPicture').src="data:image/png;base64," + jsonObj.segmentPicture
    }

        setMessageInnerHTML(event.data);
    }
 
 
    //连接关闭的回调方法
    websocket.onclose = function(){
        setMessageInnerHTML("close");
    }
 
 
    //监听窗口关闭事件，当窗口关闭时，主动去关闭websocket连接，防止连接还没断开就关闭窗口，server端会抛异常。
    window.onbeforeunload = function(){
        websocket.close();
    }
 
 
    //将消息显示在网页上
    function setMessageInnerHTML(innerHTML){
        document.getElementById('message').innerHTML = innerHTML + '<br/>';
    }
 
 
    //关闭连接
    function closeWebSocket(){
        websocket.close();
    }
 
 
    //发送消息
<!--    function send(){-->
<!--        var message = document.getElementById('text').value;-->
<!--        websocket.send(message);-->
<!--    }-->















</script>
</html>